نتایج جستجو برای: noise estimation
تعداد نتایج: 439759 فیلتر نتایج به سال:
New Time-Frequency Domain Pitch Estimation Methods for Speech Signals under Low Levels of SNR Celia Shahnaz, Ph.D. Concordia University, 2009 Pitch estimation of speech signals is the key to understanding most acoustical phenomena as well as accurately designing many practical systems in speech communication. It is to determine the fundamental frequency or period of a vocal cord vibration causi...
Most of the wavelet threshold denoising methods need to calculate the corresponding threshold. The estimation of noise variance will directly affect the effect of threshold denoising method. This paper describes a new phase matching method of the noise variance estimation. The real-time noise can be estimated by this method. The experiments show that the method can greatly improve the signal to...
Introduction: In Iran country, small enterprise with less than 10 workers comprise about %90 of all industries and 80% of working population. Noise, higher than the permissible level is among the hazardous agents, workers in these plants facing with. The aim of this study was to investigate the correlation between screening estimation and noise measurement in small plants. . Material and Metho...
This paper presents an optimized kernel minimum noise fraction transformation (OKMNF) for feature extraction of hyperspectral imagery. The proposed approach is based on the kernel minimum noise fraction (KMNF) transformation, which is a nonlinear dimensionality reduction method. KMNF can map the original data into a higher dimensional feature space and provide a small number of quality features...
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